– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Wed 11 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Wed 11 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Wed 11 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryModerate rain (total 10mm), heaviest on Wed night giving way to a moderate fall of snow, heaviest on Thu afternoon. Freeze-thaw conditions (max 7°C on Wed night, min -4°C on Fri night). Winds decreasing (strong winds from the W on Wed night, calm by Fri morning). | Days 5–7 Weather SummaryA light covering of new snow mostly falling on Sun night. Becoming milder with moderate rain (total 14mm) heaviest on Sun night. Freeze-thaw conditions (max 9°C on Tue afternoon, min -4°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | |  |  |  | | | | |  | |  | | |  | |
heavy rain | cloudy | light snow | mod. snow | light snow | cloudy | some clouds | snow shwrs | some clouds | some clouds | cloudy | cloudy | mod. snow | light rain | light rain | light rain | cloudy | light rain | cloudy | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | — | 3 | 7 | 1 | — | — | 1 | — | — | — | — | 6 | — | — | — | — | — | — | |
10 | — | — | — | — | — | — | — | — | — | — | — | 6 | 0.9 | 4 | 2 | — | 0.2 | — | |
max °C | 7 | 0 | 0 | -1 | 1 | 1 | -1 | -1 | 0 | -2 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | 8 |
min °C | 0 | 0 | 0 | -1 | -1 | 1 | -4 | -2 | 0 | -4 | -2 | 1 | 1 | 4 | 5 | 6 | 6 | 8 | 7 |
-5 | -5 | -4 | -3 | -1 | 1 | -4 | -5 | -3 | -4 | -4 | -1 | -2 | 2 | 3 | 5 | 5 | 8 | 6 | |
650 | 500 | 500 | 350 | 600 | 650 | 0 | 400 | 500 | 0 | 700 | 700 | 1350 | 2800 | 3150 | 2950 | 2950 | 2900 | 2700 | |
Cloud base (m) | 600 | 600 | 600 | 600 | 600 | 550 | 600 | 700 | 750 | 700 | 2350 | 1000 | 600 | 600 | 600 | 600 | 950 | 750 | 3450 |
 | — | 7:28 | — | — | 7:26 | — | — | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — |
 | — | — | 7:07 | — | — | 7:08 | — | — | 7:10 | — | — | 7:12 | — | — | 7:14 | — | — | 7:15 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Moderate rain (total 10mm), heaviest on Wed night giving way to a moderate fall of snow, heaviest on Thu afternoon. Freeze-thaw conditions (max 7°C on Wed night, min -4°C on Fri night). Winds decreasing (strong winds from the W on Wed night, calm by Fri morning).
South Twin Sister Weather (Days 3-6):
A light covering of new snow mostly falling on Sun night. Becoming milder with moderate rain (total 14mm) heaviest on Sun night. Freeze-thaw conditions (max 9°C on Tue afternoon, min -4°C on Sat night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.